The effects of chain-grafting density, chain composition, and interactions between different species on the self-assembled structures and chain conformations of planar grafted ABA triblock copolymers in a solvent selective for the middle B-block are investigated systematically using 3-dimensional lattice self-consistent field calculations. Structures with one A-rich layer (S1Aa and S1Ab) and with two A-rich layers (S2A) are predicted and the corresponding formation conditions are identified. It is the competition between the entropy and enthalpy that results in the formation of different structures. The copolymer chain composition affects the balance between entropy and enthalpy, and therefore has a significant influence on the resulting structure and chain conformations. In structures S1Aa and S1Ab, the free A-blocks fold into the B-rich domain and the grafted A-rich domain, respectively, whereas in structures S2A the free A-blocks do not fold. Our results are compared with available experimental and simulation results of related systems.

利用三维晶格自律系统地研究了在对中B嵌段有选择性的溶剂中，链接枝密度，链组成以及不同物种之间的相互作用对平面接枝ABA三嵌段共聚物的自组装结构和链构象的影响。 -一致的字段计算。预测具有一个富A层（S1Aa和S1Ab）和两个富A层（S2A）的结构，并确定相应的形成条件。熵和焓之间的竞争导致形成不同的结构。共聚物链的组成影响熵和焓之间的平衡，因此对所得结构和链构象有重大影响。在结构S1Aa和S1Ab中，游离的A-嵌段分别折叠成富含B的结构域和接枝的富含A的结构域，而在结构S2A中，游离的A-嵌段不折叠。我们的结果与相关系统的可用实验和仿真结果进行了比较。